<?php
/*
Plugin Name: Stumble Info Link
Version: 1.1
Plugin URI: http://leau.net/su/
Author: Edward de Leau
Author URI: http://edward.de.leau.net
Description: Places a grey or colored stumble-upon icon and link behind each url
License: Copyright 2008  edward de Leau  (email : deleau@gmail.com)

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
Installation:
	1. Upload the directory in your plugins directory
	2. Activate the plugin from your WordPress admin 'Plugins' page.
	3. Change the settings in the admin panel
Version History:
	v.0.1 primary version
	v.0.2 skipped .zip, .pdf
	v.0.3 added colors to the icon: grey if not in su, colored if it is
	v.0.4 changed to use local rss reader and cache instead of my server!
	v.0.5 bugfixed
	v.0.6 distinction between 0 and -1.
	v.0.7 several fixes
	v.0.8 added seperate function to use in your websites
	v.0.9 added text, icon, admin panel changes, new supericon
	v.1.0 single button, dark buttons, own stylesheet
	v.1.1 changed directory structure for auto update purposes
 Issues:
	Can be submitted here: http://code.google.com/p/wp-su-plugin/issues/list
 SVN:
	Here: http://code.google.com/p/wp-su-plugin/source/checkout
	AND Here:
 Wiki:
	Here: http://code.google.com/p/wp-su-plugin/w/list

*/

include_once(ABSPATH . WPINC . '/rss.php');

$stumbleinfo_options = get_option('stumbleinfo');
add_action('admin_head', 'stumbleinfo_admin_head');

function stumbleinfo_admin_head()
{
    add_options_page('StumbleInfo', 'StumbleInfo', 'manage_options', 'stumbleupon-wordpress-plugin/options.php');
}

function checkSURating($feedUrl) {

	$shortHttpString = str_replace('http://', '', $feedUrl);
	$shortHttpString = str_replace('https://', '', $feedUrl);

	$feedUrl = 'http://www.stumbleupon.com/reviews.php?url=' . $feedUrl;
	$rss = fetch_rss("$feedUrl");
	if  ($rss->channel['title']) {
		return count($rss->items);
	} else {
		return -1;
	}
}

function strxchr($haystack, $needle, $l_inclusive = 0, $r_inclusive = 0){
   if (strrpos($haystack, $needle) !== false) {
       $left =  substr($haystack, 0, strrpos($haystack, $needle) + $l_inclusive);
       $r_inclusive = ($r_inclusive == 0) ? 1 : 0;
       $right =  substr(strrchr($haystack, $needle), $r_inclusive);
       $a = array($left, $right);
       return $a;
   } else{
       return false;
   }
}

function buildDisplayIcon($url, $title, $urlType) {
	 global $stumbleinfo_options;

	 $amountOfReviews = checkSURating($url);
	 if ($stumbleinfo_options['stumbleinfo_showicon']==1) {
		if ($amountOfReviews == -1) {
			$typeOfSuClass="wpsulink wpsulink_off";
			$ptext = "&nbsp;";
		} else if ($amountOfReviews > 9) {
			$typeOfSuClass="wpsulink wpsulink_super";
			$ptext = "&nbsp;";
		} else {
			$typeOfSuClass="wpsulink wpsulink_on";
			$ptext = $amountOfReviews;
		}
	 } else {
		$typeOfSuClass="wpsulink_none";
	 }

	 if ($urlType=='view') {
		$suburl = "url/";
	 } else if ($urlType=='submit') {
		$suburl = "submit?url=";
	 } else {
		$suburl = "submit?url=";
	 }

    $st_string  = ' <a class="' . $typeOfSuClass . '" href="http://www.stumbleupon.com/' . $suburl . $url . '" target="_blank"><span>';

	 // with icons do not show -1 or +10 texts
    if ($stumbleinfo_options['stumbleinfo_showicon']==1) {
		$st_string = $st_string . $ptext;
	 } else {
	 	if ($stumbleinfo_options['stumbleinfo_showicon']==2)  {
			if ($amountOfReviews == -1) {
				$descr = $stumbleinfo_options['stumbleinfo_loser'];
			} else if ($amountOfReviews > 9) {
				$descr = $stumbleinfo_options['stumbleinfo_winner'];
			} else {
				$descr = $stumbleinfo_options['stumbleinfo_beforesu'] . $amountOfReviews . $stumbleinfo_options['stumbleinfo_aftersu'];
			}

	 		$st_string = $st_string . $descr;
	 	}
	 }
    $st_string = $st_string . '</span></a>';
	 return $st_string;
}

function Replacer($matches) {
    $or_string  = '<a' . $matches[1] . 'href="' . $matches[2] . '"'.$matches[3].'>' . $matches[4] . '</a>';

	 $st_string = buildDisplayIcon($matches[2],'su','view');

    if (strstr ( $matches[4], '<' )) {
      return $or_string;
    } else {
      $foundstr = strxchr($matches[2], ".", 1, 1);
      if ($foundstr && (stristr('.zip .pdf .arj', $foundstr[1]) != FALSE)) {
            return $or_string;
      }
      return $or_string . $st_string;
    }
}

function add_stumble_icon ($text) {
    return preg_replace_callback('/<a(.*?)href="(.*?)"(.*?)>(.*?)<\\/a>/i', 'Replacer', $text);
}

function add_stylesheet() {
   global $stumbleinfo_options;

	if (!$stumbleinfo_options['stumbleinfo_ownstylesheet']) {

		$plugin_loc = '/wp-content/plugins/stumbleupon-wordpress-plugin/img' . $stumbleinfo_options['stumbleinfo_button'] . '/';
		$plugin_base = get_bloginfo('wpurl');
   	$plugin_root = $plugin_base . $plugin_loc;

		echo "\n\t<style type=\"text/css\">\n";
		echo "a.wpsulink_off {text-decoration: none; font-size:10px; vertical-align: baseline; font-family: arial; font-weight: 900; color: #fff;}\n";
		echo "a.wpsulink_off span {background: url(".$plugin_root."off.gif) no-repeat scroll center left; text-indent:17px; display:inline-block;width:35px;}\n";

		echo "a.wpsulink_on {text-decoration: none; font-size:10px; vertical-align: baseline; font-family: arial; font-weight: 900; color: #000;}\n";
		echo "a.wpsulink_on span {background: url(".$plugin_root."on.gif) no-repeat scroll center left; text-indent:17px; display:inline-block;width:35px;}\n";

		echo "a.wpsulink_super {text-decoration: none; font-size:10px; vertical-align: baseline; font-family: arial; font-weight: 900; color: #000;}\n";
		echo "a.wpsulink_super span {background: url(".$plugin_root."super.gif) no-repeat center bottom left; text-indent:17px; display:inline-block;width:35px;}\n";
		echo "</style>\n";
	}
}

//
// Call this function in your templates!
//
function stumbleInfoButton($url,$title='su',$urlType='submit') {
	 echo buildDisplayIcon($url,$title,$urlType);
}

if (!$stumbleinfo_options['stumbleinfo_onlybutton']) {
	add_filter('the_content', 'add_stumble_icon', 9);
}

add_action('wp_head', 'add_stylesheet');
?>
